Trouble in paradise? Vishnu/FFtec N54 335ii Single Turbo kits experiencing issues as a BimmerBoost member runs 12.5@121 with misfires and having to short shift

Trouble in paradise? Vishnu/FFtec N54 335ii Single Turbo kits experiencing issues as a BimmerBoost member runs 12.5@121 with misfires and having to short shift

If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

Trouble in paradise? Vishnu/FFtec N54 335ii Single Turbo kits experiencing issues as a BimmerBoost member runs 12.5@121 with misfires and having to short shift

BimmerBoost would like to thank member GeorgiaTech335Coupe for his openness and honesty regarding his Vishnu/FFTEC single turbo setup. Recently, this member took his single turbo upgraded 6-speed manual 335i to the PBIR (Palm Beach International Raceway) dragstrip in Florida to do some testing. His best run was a 12.50@121.6 alongside a 12.8@117. Yes, these times are quite a ways away from the 10.8@131 glory pass from Vishnu demonstrating the kits capability.

This is in no way the fault of GeorgiaTech335Coupe who experienced misfires on his car and had to short shift at 6300 rpm in order to avoid them. Now, Vishnu has basically portrayed this kit as perfect and ready for sale with nobody having any issues. The reason BimmerBoost is bringing this issue to the attention of the community is for potential buyers to understand what they are getting into.

There is absolutely nothing wrong with having issues when modifying a car to this level and BimmerBoost is confident Vishnu will resolve them. There is something wrong with pretending nothing is wrong. A few cars with the single turbo kits have gone up for sale and apparently a total of three people, that are willing to open their mouths, are having misfire issues with these kits.

These issues will no doubt get resolved but potential buyers and current customers needs to be aware of the process, effort, and that progress is being made. Pretending nothing is wrong and collecting money simply is the wrong way to go about this and once again (it's becoming a trend) BimmerBoost is the only site bringing these issues to the attention of the community.

For the record, a member by the name of @tmo335tt says he has a hardware solution for the misfires that he will likely share with Vishnu (hopefully not for free). Interesting that it isn't Vishnu but the community solving this.

Thanks again to @GeorgiaTech335Coupe for sharing his details, good or bad, as we all learn thanks to honesty and openness. There is more to tuning than just collecting money.

Well, Dz replaced the RECTANGRINGs and @tmo335tt has opened his head up. Dz previously theorized that broken RECTANGRING/s could throw off VANOS and cause misfires. My money is on broken RECTANGRING/s causing the misfires. Replacement of the RECTANGRING/s and Cam Ledges is my guess at tmo's hardware fix.

I put in the the time on this because I can't sleep when my car is acting up and I don't know why and no one else does either. The only way to fix something right is to do it yourself. Shiv would have been married to this problem but there is a reason why he never experienced it with his car.

Dzenno's problem was not software related but he was able to use software to work around the issue.

The problem is 100% hardware related.

Appreciate your persistence here. Given you said its 100% hardware related that would mean you fixed it already. If you're stipulating/theorizing its hardware let's try not to make claims around 100% solutions unless they're tested and confirmed 100%. I've been in that boat too many times thinking its been solved only for the issue to rear its ugly head again and go back to the drawing board. Eventually I found my peace with the Disable Misfire Detection checkboxes

Well, Dz replaced the RECTANGRINGs and @tmo335tt has opened his head up. Dz previously theorized that broken RECTANGRING/s could throw off VANOS and cause misfires. My money is on broken RECTANGRING/s causing the misfires. Replacement of the RECTANGRING/s and Cam Ledges is my guess at tmo's hardware fix.

Both of those (cam bearing ledges as well as rectangrings) were replaced and the issue is still there. Its not them either.

So, of those who haven't had issues, is there a common-link between them? CaptainInsano mentions an early 2007 6MT. The MSD81 came into service post March 2008 correct? Who's running an MSD80 and who'se running an MSD81?

I'm on MSD80, car's production date is Dec 2007. I think we've been through this already and it wasn't related but worth a shot again now that we've got the discussion going.

I've been through everything on my e90 and it has been a very frustrating process. There are a bunch of computer jockeys on here that take cheap shots at people and start fights to try and make a point. I'm not one of them and I don't help people like that.. some dick earlier was saying he guaranteed that the problem was too much meth. Lostmarine tried to jump in and pull up my old posts as if he was going to jam me up but he didn't know that I have two 335's. The bottom line is that the guys who are having the misfire issue will get their problem resolved and the rest can try to figure it out themselves...good luck. Also Dzenno will be happy to find out that I figured it out. I appreciate all of his posts that were helpful and at least he was wrenching and not just posting BS.

You're kind of being a computer jockey and a huge drama queen by blue balling the entire forum. If you really do have a solution, come out and say it. Instead you are perpetuating what you claim to be above. Its pretty gross and tbh if this is your style, I would rather find a solution elsewhere. Maybe you were just drunk last night or something, hope you come around and we all can get on to furthering this platform.

Wants to turn off misfire detection to see what is happening at that point.

Ok, good. That's the right thing to do for sure. Key thing to realize is if the car behaves 100% smooth with misfire detection off then I'd say its safe to conclude (at least in my case it was sufficient) that it is not hardware and to stop dumping time/money on the issue until its handled in the software and misfire detection algorithms are well known and can be adjusted.